Lenze 931W - Handbuch (Seite 48)

Safety instructions
Residual hazards
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48 MA 13.1002 DE−EN DE/EN 1.1
1.2 Residual hazards
Protection of persons
After power−off, the pins of the voltage supply X2 still carry hazardous voltages
for at least 3 minutes!
ƒ Before working on the controller, check that no voltage is applied to the
power terminals.
ƒ Always protect the power terminals against contact.
The discharge current to ground (PE) is > 3.5 mA, in accordance with EN 61800
ƒ If a fixed installation is required, just design the PE conductor with a cable
cross−section of at least 1.5 mm
2 , or design the PE conductor double.
Observe appropriately installed cables, correct bolted connections, and correct
plug connections.
Due to the high currents in applications with extra−low voltages,
current−carrying parts can be strongly heated.
Device protection
ƒ Connect or disconnect all pluggable terminals in a deenergised state only!
ƒ A cyclic connection and disconnection of the supply voltage can overload
and destroy the input current limitation of the drive controller:
– When effecting a cyclic switching of the supply voltage over a longer
period, the period between two switch−on processes at least has to be
one minute!
Motor protection
Drive systems can reach dangerous overspeeds (e.g. setting of high field
frequencies for motors and machines which are not qualified for this purpose):
ƒ The controllers do not offer any protection against these operating
conditions. Use additional components for this.
Protection of the machine/system
A missing or incorrect resolver adjustment can bring about undefined control
states. The perfect operation is no longer guaranteed.